Originally Posted by
obd2
This weekend I tuned a 2018 Trackhawk, yes ecu unlock and access cable was needed. Trackhawk mods are pulley, CAI, Headers, id1050. Was able to dial in correct lamda throughout full RPM range and timing of around 20 without knock on 91 octane. It pulls strong (full boost) without any issues when on Track setting. However if rolling about 50 mph on normal or Sport setting when you put pedal the metal full boost happen (not if you launch it from a dig, boost is limited) trackhwak goes into limp mode, WTF? No ecu codes visible. Seems like limp mode is caused by ABS/stability module in my opinion.
? In normal drive mode when launching from a dig boost is limited to 130 kpa going through the gears. Same issue if traction control off
? In normal mode if you select 3 gear manual mode while rolling full boost happens 210 kpa pulls strong and able to shift without issues manually.
? in normal mode if rolling 50 mph down shift full boost then goes into limp mode with no visible codes. Same issue if traction control off
? in sport mode launches from a dig boost starts at 131kpa (low boost) then boost fluctuates if full boost happens long enough limp mode happens
? In track mode no issues pulls with full boost in all gears. NO ISSUES
Has anyone seen this issues? Currently workaround is to do WOT in track mode and he seems fine with this. However I would like to solve limp mode issue. To reset limp mode turn off car open door and restart limp mode reset